Is Isophorone Diisocyanate (IPDI) interchangeable with TDI, HDI or H12MDI?

No. These diisocyanates have different structures and formulation behavior. IPDI, CAS 4098-71-9, should be specified separately from TDI, HDI and H12MDI; replacing one with another can change the intended polyurethane system.

Is IPDI a finished polyurethane coating or adhesive?

No. IPDI is a reactive monomer raw material. It is combined with selected polyols, prepolymers or other formulation components to make polyurethane coatings, adhesives, sealants or elastomers; the final product is defined by the complete formulation.

Which IPDI values should be confirmed before production use?

Confirm NCO content, assay, color, hydrolysable-chlorine limit, viscosity, packaging and any moisture-control requirements. The batch COA, product TDS and SDS should be reviewed against the agreed monomer grade and the intended polyurethane process.

Isophorone Diisocyanate (IPDI) CAS 4098-71-9

Isophorone Diisocyanate (IPDI), CAS 4098-71-9, is a cycloaliphatic aliphatic diisocyanate monomer for polyurethane coatings, adhesives, sealants and elastomers. Commonly called IPDI, it provides two reactive isocyanate groups for polyurethane systems and is selected where aliphatic chemistry is required. 1,6-Hexanediol is a related diol component for aliphatic polyurethane systems. The industrial monomer grade is specified by NCO content, purity, color and hydrolysable-chloride limits. Batch COA, TDS and SDS can be matched to the agreed packaging and production application.

CAS: 4098-71-9
Synonyms: IPDI, 3-Isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate
Einecs: 223-861-6
Molecular Formula: C₁₂H₁₈N₂O₂
Grade: Industrial IPDI monomer
Package: 200 kg steel drums; IBCs by agreement
Appearance: Clear to pale-yellow liquid
Assay (GC): ≥99.5%
NCO content: 37.5–37.8%
Hydrolysable chlorine: ≤200 ppm

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Product Description

1 Product Introduction

2 Applications

3 Material Scope and Documentation

Product Introduction

Isophorone Diisocyanate (IPDI) (CAS 4098-71-9) is a cycloaliphatic diisocyanate raw material for light-stable polyurethane resins and crosslinker intermediates. The listed material is monomeric IPDI for industrial formulation and resin manufacture; it is not an IPDI trimer, prepolymer or finished polyurethane hardener.

Applications

Polyurethane coatings, including durable industrial coating resin routes
Urethane adhesive and sealant prepolymer manufacture
Polyurethane dispersions and urethane-acrylate resin systems
Elastomer, cast-resin and specialized crosslinker production

Material Scope and Documentation

The order specification confirms monomeric IPDI identity rather than an IPDI derivative, then the agreed NCO content, colour and applicable purity or moisture controls. The material is for industrial processing and the handling requirements follow the supplied SDS. A batch COA and the relevant TDS are available for the quoted grade, with packaging and quantity selected for the specified production route.

For related polyurethane and isocyanate pages, review Aliphatic Polyisocyanate HDI Trimer, Isocyanate, and Polyurethane.

FAQ - Technical & Supply Chain

Q:
Is Isophorone Diisocyanate (IPDI) interchangeable with TDI, HDI or H12MDI?

A: No. These diisocyanates have different structures and formulation behavior. IPDI, CAS 4098-71-9, should be specified separately from TDI, HDI and H12MDI; replacing one with another can change the intended polyurethane system.
Q:
Is IPDI a finished polyurethane coating or adhesive?

A: No. IPDI is a reactive monomer raw material. It is combined with selected polyols, prepolymers or other formulation components to make polyurethane coatings, adhesives, sealants or elastomers; the final product is defined by the complete formulation.
Q:
Which IPDI values should be confirmed before production use?

A: Confirm NCO content, assay, color, hydrolysable-chlorine limit, viscosity, packaging and any moisture-control requirements. The batch COA, product TDS and SDS should be reviewed against the agreed monomer grade and the intended polyurethane process.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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